This variable is the amount of public assistance payments (AFDC or TANF) that a respondent received month M of year Y. M goes from 1 to 12 and represents the calendar month. Y goes from 1 to 6 and represents the number calendar year for a given SIPP panel. The variable comes from the core file. The relevant SIPP variables are I20AMT1-I20AMT4 in 1984; S20AMT in the 1990, 1991, 1992, and 1993 panels; T20AMT in the 1996, 2001, 2004, and 2008 panels.